If you need to execute fixes for your Yamaha XZ 550 S then it is usually a great idea to own a Workshop Manual for a reference just in case you need to know easy methods to take out a specific part for example Wheel Bearing and install it again in the right way.
Yamaha XZ 550 S Workshop Manuals gives you identifiable diagnostic wisdom with regards to your car so if something is faulty it helps you understand what the situation is and some ways to resolve it. You will be able to decide if this can be done on your own or in case the job is simply too big you can actually book your XZ 550 S in to a trusted car garage.
Yamaha XZ 550 S manual